Bug 833738 - [Gallery] Image dragging added while setting the wallpaper from gallery r=davidflanagan

Removing unused variables

CSS transform instead of background-position in wallpaper share

lint fixes for wallpaper app

css fixes in wallpaper app
Merge pull request #9832 from michalbe/bug833738

Bug 833738 - [Gallery] Image dragging added while setting the wallpaper ... r=davidflanagan